List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-max_ranking&page=57
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "奇月第二个星期天的比赛\nCOTSSOOM(Competition on the second Sunday of odd months)S1",
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        {
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                "username": "𝙿𝚞𝚝 𝙺.",
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            "description": "22th happy tourney, I will create a new tournament with this name every Monday, have fun!",
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